US4736656A - Extrusion die and manufacturing method of same - Google Patents

Extrusion die and manufacturing method of same Download PDF

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Publication number
US4736656A
US4736656A US06/910,983 US91098386A US4736656A US 4736656 A US4736656 A US 4736656A US 91098386 A US91098386 A US 91098386A US 4736656 A US4736656 A US 4736656A
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Prior art keywords
bearing
workpiece
bearing opening
draft
wire electrode
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Expired - Lifetime
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US06/910,983
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English (en)
Inventor
Shoji Futamura
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Institute of Technology Precision Electrical Discharge Works
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Institute of Technology Precision Electrical Discharge Works
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Priority claimed from JP58182319A external-priority patent/JPH0620566B2/ja
Priority claimed from JP59004595A external-priority patent/JPS60148625A/ja
Priority claimed from JP59006123A external-priority patent/JPH0716828B2/ja
Application filed by Institute of Technology Precision Electrical Discharge Works filed Critical Institute of Technology Precision Electrical Discharge Works
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/06—Control of the travel curve of the relative movement between electrode and workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects

Definitions

  • This invention relates generally to an extrusion die and a method of making the same, and more specifically to an extrusion die having on the front surface thereof a bearing opening of the shape of a given section, and a draft formed over a length from the bearing opening toward the rear surface of the die wherein all or part of the bearing surface and the draft constituting the inner circumferential surface of the bearing opening are formed by means of the wire- gutting discharge machining equipment, and a method of making the same.
  • FIGS. 1 (A) through (C) An extrusion die as illustrated in FIGS. 1 (A) through (C) is known as a conventional type of extrusion die for extruding aluminum extrusions.
  • FIG. 1 (A) is a plan view
  • FIG. 1 (B) is a sectional side elevation taken along line A-A' in FIG. 1 (A)
  • FIG. 1 (C) is a bottom plan view of the conventional type of extrusion die, respectively.
  • reference numeral 1 refers to an entrance portion; 2 to a bearing opening; 3 to a draft; and 4 to a shouldered portion of the draft 3, respectively.
  • FIGS. 2 (A), (B) and (C) are crosssectional views taken along lines A-A', B-B' and C-C', respectively in FIG. 1, and FIG. 3 is a development of the bearing surface.
  • Reference numerals 2 through 4 throughout the figures correspond with like numerals in FIG. 1, and 5 refers to a bearing surface and 6 to a draft tapered surface, respectively.
  • the bearing length 1 (as shown in FIG. 1 (B)) in the bearing opening 2 is predetermined in accordance with the shape of the bearing opening 2. That is, the bearing length, 1 c is made larger, as shown in FIG. 2 (C), in a bearing opening portion having a larger width and the adjacent portions thereof, de is shown by arrows in FIG. 1 (C), while the bearing length, 1 b is made smaller, as shown in FIG. 2 (B), in bearing opening portions, bc and fg having a smaller width, as shown by arrows in FIG. 1 (C). Furthermore, the bearing length, 1 a is made further smaller, as shown in FIG. 2 (A), in a bearing opening end portion, ha as shown by arrows in FIG.
  • FIG. 1 (C) which has the same width as the adjacent portions thereof but involves retarded metal flow.
  • the bearing surface thus formed assumes a shape shows in FIG. 3 in a developed form. Arrows a through h in FIG. 3 correspond to the arrows a through h in FIG. 1 (C).
  • the bearing surface 5 of the bearing opening 2 in the conventional type of extrusion die described above is machined by the wire-cutting discharge machining equipment, while the draft shouldered portion 4 and the draft tapered surface 6 are machined by an ordinary discharge machining equipment, milling machine or other type of machine tool.
  • the machining of the draft shouldered portion 4 is required because it is difficult to form with high precision the aforementioned bearing lengths 1 a , 1 b and 1 c , and the portions between ab, cd, ef and gh as shown in FIG. 3 merely by machining the bearing surface 5 and the draft tapered surface 6.
  • the following problems are encountered in manufacturing an extrusion die of the conventionad type.
  • the conventional type of extrusion die involves a large number of manhours and high manufacturing costs. Furthermore, provision of the draft shouldered portion 4 tends to decrease mechanical strength in the portions close to the bearing opening 2, leading to deformation and cracks in the thin-walled portions around the bearing opening 2.
  • FIGS. 1 through 3 are diagrams of assistance in explaining an extrusion die of the conventional type; FIG. 1 (A) being a plan view, FIG. 1 (B) being a sectional side elevation taken along line A-A' in FIG. 1 (A), FIG. 1 (C) being a bottom plan view, FIG. 2 (A) being a cross-sectional view taken along line A-A' in FIG. 1 (C), FIG. 2 (B) being a cross-sectional view taken along line B-B' in FIG. 1 (C), FIG. 2 (C) being a cross-sectional view taken along line C-C' in FIG. 1 (C), and FIG. 3 being a development of a bearing surface, respectively.
  • FIGS. 1 (A) being a plan view
  • FIG. 1 (B) being a sectional side elevation taken along line A-A' in FIG. 1 (A)
  • FIG. 1 (C) being a bottom plan view
  • FIG. 2 (A) being a cross-sectional view taken along line A-A
  • FIGS. 4 (A) through (C) are diagrams of assistance in explaining an extrusion die embodying this invention
  • FIGS. 5 (A) through (C) are diagrams of assistance in explaining another embodiment of the extrusion die according to this invention
  • FIG. 6 is a further embodiment of the extrusion die of this invention
  • FIG. 7 shows an embodiment of the manufacturing equipment used for manufacturing the extrusion die of this invention
  • FIGS. 8 (A) through (E) are diagrams of assistance in explaining an embodiment of the manufacturing method of this invention
  • FIG. 9 is a diagram of assistance in explaining another embodiment of the manufacturing method of this invention
  • FIG. 10 is a diagram of assistance in explaining the mechanism for generation of separated fine metal chips during the manufacturing process of this invention.
  • FIGS. 4, 5 and 6 Each embodiment of the extrusion die of this invention will be described in the following, referring to FIGS. 4, 5 and 6.
  • reference numerals 2, 3, 5 and 6 correspond to like numerals in FIG. 2, and 7 to a notched portion.
  • FIGS. 4 through 6 is concerned with the extrusion die corresponding to the conventional type of extrusion die shown in FIGS. 1 through 3.
  • FIGS. 4 (A), (B) and (C) are crosssectional views taken along lines A-A', B-B' and C-C' in FIG. 1 (C) illustrating the extrusion die of this invention, whose bearing surface 5 and draft tapered surface 6 are manufactured with the wire-cutting discharge machining equipment, which will be described later.
  • the bearing surface 5 in the embodiment shown in FIG. 4 is machined in the same manner as with the conventional type of extrusion die.
  • the draft tapered surface 6 constituting the draft 3 is also machined with the wire-cutting discharge machining equipment shown in FIG. 7, as will be described later, by controlling the inclination angle and/or travelling position of the wire electrode in accordance with the shape of the bearing opening 2 (the manufacturing method will be described in detail later).
  • FIG. 4 is an extrusion die having a bearing opening 2 defined by a desired bearing surface 5, as shown in the development shown in FIG. 3 without providing a draft shouldered portion 4 (shown in FIG. 2) as provided in the conventional type of extrusion die.
  • the bearing surface 5 having different bearing lengths (for example, l a , l b , l c , etc. as shown by arrows in FIG. 3) at predetermined positions in accordance with the shape of the bearing opening 2 is formed by machining the draft tapered surface 6 while controlling the inclination angle and/or travelling position of the wire electrode so as to ensure the uniform flow rate of an aluminum slug passing through the bearing opening 2.
  • the amount of correction of the bearing length is usually so small that it can be corrected with a file.
  • FIG. 5 is an extrusion die in which, after the draft tapered surface 6 has been machined in the same manner as with the embodiment shown in FIG. 4, a notched portion 7 is provided within a range that can be visually inspected and corrected and can prevent the extrusion from sticking, that is, to a depth of 0.1 to 1.0 mm, for example, on the draft tapered surface 6 at the intersection line of the bearing surface 5 and the draft tapered surface 6, and thereafter the bearing surface 5 is formed in the same manner as with the embodiment shown in FIG. 4. (The manufacturing method thereof will be described later.)
  • FIGS. 5 (A), (B), and (C) are cross-sectional views taken along lines A-A', B-B' and C-C' in FIG. 1 (C).
  • FIG. 5 (A), (B), and (C) are cross-sectional views taken along lines A-A', B-B' and C-C' in FIG. 1 (C).
  • FIG. 5 is a cross-sectional view at a point D shown by an arrow in FIG. 1 (C) (a corner portion of the bearing opening).
  • the bearing surface 5 of the embodiment shown in FIG. 5 can be developed as in the case of FIG. 3.
  • the notched portion 7 is not provided at the corner portion of the bearing opening 2 in the embodiment shown in FIG. 5 (at a point D shown by an arrow in FIG. 1 (C)), as shown in FIG. 5 (D).
  • This is partly because of the manufacturing method, which will be described later, and partly because the bearing surface 5 need not be corrected at the intersection line of the bearing surface 5 and the draft tapered surface 6 at the corner portion of the bearing opening 2.
  • elimination of the notched portion leads to increased reinforcement of the corner portion to withstand the pushing force
  • FIG. 6 shows a development of the bearing surface 5 in another embodiment of this invention.
  • the embodiment shown in FIG. 6 also has the bearing opening 2 of the same shape as the extrusion die of the conventional type shown in FIG. 1.
  • FIG. 6 has a similar construction as the embodiment shown in FIG. 5.
  • the flow rate of an aluminum slug passing through the bearing opening 2 varies with the shape of the bearing opening 2, and decreases particularly at corner portions.
  • the bearing lengths at corners D, D, - - - in the embodiment shown in FIG. 6 are made smaller than at other portions, as is apparent from the development shown in FIG. 6.
  • reference numeral 8 refers to a work table; 9 and 10 to control motors for driving the work table 8 in orthogonally intersecting lengthwise and widthwise directions; 11 to a work piece; 12 to a wire electrode; 13 to a wire electrode feeding roller; 14 and 17 to tension rollers; 15 to an upper guide; 16 to a lower guide; 18 to a scrap roller; 19 and 20 to control motors for driving the upper guide 15 in orthogonally intersecting lengthwise and widthwise directions to adjust the inclination angle of the wire electrode 12; 21 to a cutter arbor; 22 to a milling cutter; 23 to a control motor for controlling the feed of the cutter arbor 21, respectively.
  • the manufacturing equipment shown in FIG. 7 is a combined wire-cutting discharge machining equipment and milling machine for manufacturing the extrusion die of this invention. Since the wire-cutting discharge machining equipment and the milling machine used are well known types, description of them will be made only briefly
  • the work table 8 is driven in orthogonally intersecting lengthwise and widthwise directions by the control motors 9 and 10.
  • the wire electrode 12 for cutting the workpiece 11 placed on the work table 8 is wound up by the scrap roller 18 via the wire electrode feeding roller 13, the lower guide 16, and the tension roller 17.
  • the wire electrode 12 stretched between the upper guide 15 and the lower guide 16 is tensioned by the tension rollers 14 and 17 and caused to travel in a taut state. Since the upper guide 15 is constructed so as to be moved in orthogonally intersecting lengthwise and widthwise directions by the control motors 19 and 20, the inclination angle of the wire electrode 12 between the upper guide 15 and the lower guide 16 can be adjusted to any desired angle.
  • machining operations such as the machining of the notched portion as described earlier
  • Other machining operations can be achieved by performing desired milling operations by the use of the cutter arbor 21 set on the same bed, or by jig grinding operations by replacing the milling cutter 22 with a grinding wheel, through the control of the control motor 23 for controlling the feed of the milling cutter 22 and the control motors 9 and 10 for driving the work table in lengthwise and widthwise directions.
  • discharge machining is also possible by replacing the cutter arbor with an ordinary discharge machining head (not shown).
  • the manufacturing equipment described above is capable of machining the workpiece in accordance with a predetermined program, or in a numerically controlled mode.
  • the manufacturing equipment described above is capable of virtually automatically machining the bearing opening 2 and the draft 3 of the extrusion die of this invention.
  • the abovementioned program may be considered as determined by the calculations performed based on the information on the shape of the bearing opening 2 being machined, the bearing length of the bearing surface 5, the inclination angle of the draft tapered surface 6, and the amount of notching of the notched portion 7.
  • the extrusion die of this invention as shown in FIGS. 4 through 6 is manufactured by machining in advance a die stock into a state before the machining of the bearing opening 2 and the draft 3, that is, a state where only the front surface, rear surface, recessed portion and outer circumferential surface of the extrusion die have been machined, as shown in FIG. 1 (in this Specification, the extrusion die machined in this state is called a workpiece). And then, the work piece 11 is heat treated and machined to form the bearing opening 2 and the draft 3 with the abovementioned manufacturing equipment.
  • the workpiece 11 is placed on the work table 8 in such a state that the front surface of the workpiece 11 comes in contact with the upper surface of the work table 8 of the manufacturing equipment shown in FIG. 7 (that is, a state where the bearing opening 2 being machined is directed downward, with the draft 3 faced upward, as shown in FIG. 8). Then, the workpiece 11 is cut by wire-cutting discharge machining while controlling the position and inclination angle of the wire electrode 12 with numerical control based on a predetermined program so that a machining allowance for the bearing surface 5 (as shown by dotted lines in FIG. 8 (A)).
  • the program for numerical control is determined by calculations made based on the information on the shape of the bearing opening 2, the bearing length 1 of the bearing surface 5 at each position of the bearing opening 2, and the inclination angle of the draft tapered surface 6 at each position.
  • FIG. 8 (D) shows an embodiment where the workpiece is NC-machined, with the inclination angle ⁇ of the draft tapered surface 6 maintained constant. With this arrangement, therefore, any desired draft tapered surface 6 can be machined by controlling the position of the wire electrode 12.
  • the coordinates of a point P corresponding to the bearing surface 5 being machined and a bearing length 1 l at each coordinate point are given.
  • the coordinates of the position (a point P 1 shown by an arrow in the figure) of the wire electrode 12 corresponding to the point P can be obtained from the following expression.
  • the wire electrode 12 is caused to pass over the desired intersection point (a point P 1 ' as shown by an arrow in FIG. 8 (D)) of the bearing surface 5 and the draft tapered surface 6 by controlling the position of the wire electrode 12 based on the coordinates of the point P 1 obtained from Expression (1) above.
  • the wire electrode 12 By controlling the position of the wire electrode 12 based on the coordinates of the point P 2 obtained from Expression (2), the wire electrode 12 is caused to pass over the desired intersection point (a point P 2 ' shown by an arrow in FIG. 8 (D)) of the bearing surface 5 and the draft tapered surface 6.
  • the inclination angle ⁇ may also be controlled together with the control of the position of the wire electrode.
  • the desired draft tapered surface 6 is formed by cutting the workpiece 11 to the shape of the bearing opening 2 with the wire electrode 12. Needless to say, a block 11' separated from the workpiece 11 is removed after this machining operation.
  • the bearing opening 2 is cut with the wire electrode 12 by positioning the wire electrode 12 vertical to the work table 8 (shown in FIG. 7), as shown in FIG. 8 (B), and controlling the position of the wire electrode 12 based on the coordinates (the coordinates of the point P shown by an arrow in FIG. 8 (D)) corresponding to the given shape of the bearing opening 2.
  • the extrusion die shown in FIG. 4 where the bearing surface 5 and the draft tapered surface 6 intersect with each other at the positions (points P 1 ' and P 2 ' shown by arrows in FIG. 8 (D)) corresponding to the desired bearing lengths 1 on the inner circumferential surface (i.e., the bearing surface 5) of the bearing opening 2 can be manufactured.
  • the embodiment shown in FIG. 5 has a notched portion 7 (shown in FIG. 8 (C)) provided on the draft tapered surface 6 at the intersection line of the bearing surface 5 and the draft tapered surface 6 in the embodiment shown in FIG. 4.
  • the notched portion 7 may be machined with the milling cutter 22 shown in FIG. 7 in a state where the extrusion die is kept placed on the work table 8 as it is after the draft tapered surface 6 described in the manufacturing method of the embodiment shown in FIG. 4 has been completed.
  • the bearing surface 5 may be machined on the workpiece 11. By machining in this sequence, burrs produced by the abovementioned notching operation can be removed.
  • the desired notched portion 7 can be formed.
  • the state of the relative movement of the milling cutter 22 and the workpiece 11 during the notching operation is shown in FIG. 8 (E). That is, the milling cutter 22 moves in the direction shown by an arrow line in the figure with respect to the workpiece 11.
  • the tip of the milling cutter 22 moves along the corner portion D in such a manner that the cutter 22 comes in contact with the corner portion D. For this reason, the aforementioned notching operation is not performed on the corner portion D. In this way, the extrusion die shown in FIG. 5 is manufactured.
  • the draft tapered surface 6 is machined in the same manner as with the embodiment shown in FIG. 4.
  • the bearing surface 5 having the predetermined bearing lengths (for example, l a , l b , l c ) at the positions as shown in FIG.
  • the draft tapered surface 6 may be formed by the abovementioned notching operation after the draft tapered surface 6 at each position on the inner circumferential line of the bearing opening 2 has been machined to depth positions larger than the bearing lengths (for example, l a , l b , l c , etc. shown in FIG. 5) or equal to the maximum value of the bearing length l, with the inclination angle of the draft tapered surface 6 kept constant or not kept constant.
  • the extrusion die in the embodiment shown in FIG. 6 can be easily manufactured by combining the manufacturing processes of the embodiments shown in FIGS. 4 and 5. That is, the embodiment shown in FIG. 6 is essentially the same as the embodiment shown in FIG. 5, with the exception that the bearing length at the corner portion D of the bearing opening 2 is made smaller, as shown in the development showh in FIG. 6.
  • the bearing surface at the corner portion D having the desired bearing length l by controlling the position and inclination angle ⁇ of the wire-cutting electrode 12 since the bearing length l at the corner portion.D has been given in the machining process of the draft 3 in the embodiment shown in FIG. 4. In this way, the extrusion die in the embodiment shown in FIG. 6 can be manufactured.
  • the bearing surface 5 is machined with the wire-cutting discharge machining equipment.
  • the bearing surface 5, however, may be machined with the aforementioned milling, jig grinding or ordinary discharge machining.
  • the notching operation may be performed by the abovementioned milling, jig grinding or ordinary discharge machining.
  • FIG. 9 shows still another embodiment of the manufacturing method of the extrusion die according to this invention.
  • the inclination angle of the wire electrode is capable of being controlled easily, and bearing surface machining and notching processes are performed in the same manner as in the manufacturing method described with reference to FIG. 8.
  • reference numeral 2 refers to a bearing opening; 3 to a draft; 11 to a workpiece; 12 to a wire electrode; 24 to a first profile; 25 to a second profile, respectively.
  • Points represented by P', P'- - - indicate depth points (hereinafter referred to as bearing depth points) substantially equal to the bearing lengths (for example, l a , l b , l c , etc.
  • the first profile 24 may be considered as a profile described on the die front surface (11-1 shown by an arrow in the figure) by the wire electrode 12 which passes the second profile 25 representing open profile of the draft 3 on the die rear surface (11-2 shown by an arrow in the figure) and the bearing depth points P', P'.
  • both the first and second profiles 24 and 25 are given, and pairs of two corresponding points are given on each of the profiles 24 and 25 to be followed by the wire electrode 12 at a predetermined angle to machine the workpiece 11.
  • an NC machining technique is adopted in machining the workpiece 11.
  • the first and second profiles 24 and 25, and the pairs of two corresponding points on both profiles are given as the information for NC machining so that the wire electrode 12 passes over the bearing depth points P', P', - - - as shown in FIG. 9 corresponding to the points P 1 ', P 2 '- - - shown in FIG. 8 (D).
  • the first and second profiles 24 and 25 are set so that the wire electrode 12 passes over the bearing depth points P', P', - - -
  • the first and second profiles 24 and 25 may be set so that the wire electrode 12 passes over points (not shown) deeper than the bearing depth points P', P', - - - or equal to a maximum bearing depth point (for example, l c in the embodiment shown in FIG. 5).
  • the bearing surface having predetermined bearing lengths is formed by the aforementioned notching operation after the draft tapered surface constituting the draft has been machined.
  • the manufacturing method of this invention makes it possible to manufacture the extrusion dies shown in FIGS. 4 through 6 by performing the entire machining process with the workpiece 11 placed on the work table 8, and to machine the workpiece 11 automatically with an NC machining technique.
  • This enables the manufacture of extrusion dies with high precision at substantially reduced machining cost.
  • the time required for the manufacture of the extrusion die of this invention which relies on wire-cutting discharge machining for most of machining operations, can be substantially reduced compared with the conventional manufacturing processes.
  • the machining process of the draft 3 of the extrusion die using the manufacturing method of this invention may sometimes involve an unwanted phenomenon where fine metal chips (what is referred to as separated fine metal chips in this invention) are separated from the workpiece on the front surface of the extrusion die being machined.
  • the formation of the separated fine metal chips is attributable to the factors which will be described later referring to FIG. 10, and may result in unstable wire-cutting discharge machining. This may pose an obstacle in automating the entire machining process since the separated fine metal chips have to be removed by interrupting the machining operation.
  • the mechanism of the formation of separated fine metal chips will be described in the following, referring to FIG. 10.
  • FIG. 10 (A) is a diagram illustrating the trajectory of the wire electrode 12 during machining to facilitate the understanding of the state of machining of the draft 3.
  • Reference numeral 27 in the figure refers to a trajectory of the point P 1 ; and arrow a to the direction of travel of the intersection point P 2 of the front surface 11-1 of the workpiece and the wire electrode 12; and arrow b to the direction of travel of the intersection point P 3 of the rear surface 11-2 of the workpiece 11 and the wire electrode 12.
  • the mechanism described above gives an explanation of the formation of the separated fine metal chip 26.
  • the formation of the separated fine metal chip 26, however, can be prevented by setting the inclination angle ⁇ of the wire electrode 12 to a larger value during the machining of the draft tapered surface 6 at portions where the separated fine metal chips are likely to be generated.
  • this invention makes it possible to provide an extrusion die which can be used for manufacturing extrusions with high precision and a method of making the same; and to substantially reduce the manufacturing manhours and cost and improve the mechanical strength of the die by automating the entire machining process of the bearing opening and the draft, with the workpiece placed on the work table of a manufacturing equipment combining the wire-cutting discharge machining equipment and the milling machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Extrusion Of Metal (AREA)
US06/910,983 1983-09-30 1986-09-24 Extrusion die and manufacturing method of same Expired - Lifetime US4736656A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP58182319A JPH0620566B2 (ja) 1983-09-30 1983-09-30 押出しダイスおよびその製造方法
JP58-182319 1983-09-30
JP59-4595 1984-01-13
JP59004595A JPS60148625A (ja) 1984-01-13 1984-01-13 押出しダイスおよびその製造方法
JP59006123A JPH0716828B2 (ja) 1984-01-17 1984-01-17 押出しダイスの製造方法
JP59-6123 1984-01-17

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KR (1) KR890003333B1 (ko)
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GB (1) GB2149335B (ko)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
US5270513A (en) * 1991-02-18 1993-12-14 Eropol Finance Et Developpement Process for manufacturing extrusion dies and dies thus obtained
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium
US5489756A (en) * 1994-10-28 1996-02-06 Corning Incorporated Slot fabrication by electrical discharge machining
US5660579A (en) * 1995-08-18 1997-08-26 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for forming a grinding wheel
EP0906160A1 (en) * 1996-05-13 1999-04-07 Yean-Jenq Huang Extrusion die
US6153131A (en) * 1996-05-13 2000-11-28 Huang; Yean-Jenq Method for designing an extrusion process and die
USRE38534E1 (en) 1996-05-13 2004-06-15 Altech International Limited Extrusion die

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JPS5416363A (en) * 1977-07-07 1979-02-06 Inoue Japax Res Inc Manufacture of dies
JPS55141320A (en) * 1979-04-23 1980-11-05 Nippon Light Metal Co Ltd Working method for bearing hole in extrusion die for aluminum

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Publication number Priority date Publication date Assignee Title
GB530796A (en) * 1939-02-11 1940-12-20 Continental Machine Specialtie Punch and die and method of making the same
US2341749A (en) * 1942-03-14 1944-02-15 Arthur M Webb Extrusion die
US2559523A (en) * 1946-04-11 1951-07-03 Aluminum Co Of America Extrusion die and method
US4036043A (en) * 1974-10-18 1977-07-19 Kobe Steel Ltd. Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys
JPS5416363A (en) * 1977-07-07 1979-02-06 Inoue Japax Res Inc Manufacture of dies
JPS55141320A (en) * 1979-04-23 1980-11-05 Nippon Light Metal Co Ltd Working method for bearing hole in extrusion die for aluminum

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5270513A (en) * 1991-02-18 1993-12-14 Eropol Finance Et Developpement Process for manufacturing extrusion dies and dies thus obtained
WO1994004291A1 (en) * 1992-08-25 1994-03-03 Cook, Evelyn, Grace, Joy Improvements in and relating to dies for extruding aluminium
GB2283930A (en) * 1992-08-25 1995-05-24 Michael William Cook Improvements in and relating to dies for extruding aluminium
GB2283930B (en) * 1992-08-25 1995-11-08 Michael William Cook Improvements in and relating to dies for extruding aluminium
US5489756A (en) * 1994-10-28 1996-02-06 Corning Incorporated Slot fabrication by electrical discharge machining
US5660579A (en) * 1995-08-18 1997-08-26 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for forming a grinding wheel
EP0906160A1 (en) * 1996-05-13 1999-04-07 Yean-Jenq Huang Extrusion die
US5974850A (en) * 1996-05-13 1999-11-02 Huang; Yean-Jenq Extrusion die
EP0906160A4 (en) * 1996-05-13 1999-12-01 Huang Yean Jenq EXTRUSION SECTOR
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USRE38534E1 (en) 1996-05-13 2004-06-15 Altech International Limited Extrusion die

Also Published As

Publication number Publication date
GB2149335A (en) 1985-06-12
KR850002051A (ko) 1985-05-06
DE3435424A1 (de) 1985-04-18
GB2149335B (en) 1987-05-28
DE3435424C2 (de) 1996-08-22
KR890003333B1 (ko) 1989-09-18
GB8424694D0 (en) 1984-11-07

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